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Finding the Fourth Proportional to 634.55, 876.35 and 609.95

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Solution

The fourth proportional to 634.55, 876.35 and 609.95 is: 842.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.55 : 876.35 = 609.95 : x
  2. Step 2: Convert to fraction form
    634.55/876.35 = 609.95/x
  3. Step 3: Cross multiply
    634.55x = 876.35 × 609.95
  4. Step 4: Simplify right side
    634.55x = 534,525.30
  5. Step 5: Solve for x
    x = 534,525.30/634.55
  6. Step 6: Final answer
    x = 842.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.